InsidersTradesSigma
Insider Trading & Regulation
Information that is not yet disclosed to the public and, if disclosed, would significantly influence a reasonable investor's decision to buy, sell, or hold a security.
MNPI forms the legal foundation of insider trading prohibitions under SEC Rule 10b-5 and Section 16 of the Securities Exchange Act. The determination of materiality requires a two-part test: the information must be objectively important to a reasonable investor (quantitative or qualitative) and the reasonable investor must have considered it as part of their investment decision. Examples include undisclosed earnings results, merger announcements, product recalls, major contract wins, executive departures, or significant litigation outcomes. Courts apply the 'total mix' test, evaluating whether the withheld information altered the total mix of publicly available information in a manner that would significantly alter the total mix of information available to investors.
In insider-trading surveillance and quant scoring platforms, MNPI detection systems monitor trading patterns, communication metadata, and temporal correlations between information access and trading execution to identify potential violations. Regulatory frameworks such as Regulation Fair Disclosure (Reg FD) and Market Abuse Regulation (MAR) Article 19 establish strict disclosure protocols to minimize asymmetric information advantages. Insider lists, pre-clearance systems, and cooling-off periods are structural controls designed to prevent or restrict trading while individuals possess MNPI, creating compliance checkpoints before market transactions occur.